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303 S Carbon Disc Brake Wheel - Tubeless

3.75 out of 5 stars
4 Reviews
$673.00 - $727.00

Style & Size:


303 S Carbon Disc Brake Wheel - Tubeless

Throughout Zipp's 30-year history, its pursuit has been speed, with a passionately focused mindset "…to make you faster." With aerodynamics reaching a natural plateau of performance progress, Zipp ushers in a new era with the 303 S carbon wheel that looks beyond air resistance to boost efficiency across the entire wheel-system, giving you "the next chapter of speed." Designed to match with your modern drop-bar bike's increasingly ample frame clearance and the real-world challenges, like gravel washboards and infrequently paved back-roads, the 303 S works to preserve your energy so you can make speed.

An all-new rim design is the key to Zipp's efficiency goals and replaces the 302 in Zipp's lineup. The now hookless tire bead (fitting a minimum of 25mm tires) allows the tire to sit deeper and fatter in the wheel bed, leaving the tire more flush with the rim — oddly enough, improving aerodynamics. You'll feel a more secure tire underneath you that utilizes a short-wide contact patch, improving traction and reducing tire deflection when aggressively diving in and out of turns. Essentially, the tire maintains its shape, corners better, and produces less rolling resistance with the hookless design compared to the previous generation.

Weight savings is another area of focus for the new 303 S. Zipp has dropped 150g, compared to the 302 wheelset. And with high-end modern bikes increasingly tipping over 18lb, this weight reduction is highly advantageous in competitive events.

Keeping you fast on the bike is also about keeping you rolling forward. And if you've experienced even five-miles of bone-wrecking washboard, you know that maintaining forward speed is challenging and uncomfortable on rough terrain. The 303 S allows you to run wide gravel tires (think 50mm) with low psi, thanks to a wide 23 mm inner rim-width, helping the tire absorb the road vibrations and reduce fatigue levels.


  • Endurance and performance lines converge in the all-new design
  • Aerodynamically optimized for road, but can run wide gravel tires
  • Decreased weight improves responsiveness and steep-slope speed
  • Updated graphics are asymmetrical and eye-catching
  • Tubeless and tubeless compatible tire only
  • Zipp continues to expand the capabilities of the modern wheelset
  • Item #ZIPZ04L
Rim Material
carbon (UD fiber finish)
Wheel Size
Rim Type
Rim Depth
Rim Width
[internal] 23mm, [external] 27mm
Brake Compatibility
centerlock disc
76/176 DB
Front Axle
TA 12x100
Rear Axle
TA 12x142
Spoke Nipple
Spoke Count
Max Rider Weight
253lb (115kg)
Wheel Bag Included
Claimed Weight
[front] 1lb 9.1oz (711g), [rear] 1lb 12.9oz (819g)
Manufacturer Warranty
limited lifetime
tubeless valve stem, tubeless tape

Overall Rating

3.5 based on 2 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 0 reviews
4 Stars - 0 reviews
5 Stars - 1 reviews

Fits True To Size

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5 out of 5 stars

March 12, 2024

Great wheels!

I've used it several times
Size Bought:

303S wheelset is good to go. The factory tape is solid with no leaks. Freehub has some noise but is nice and quiet compared to my GRC1400 screamers. Bought these as a second set for tarmac. Installed road tires on them. I appreciate the lower noise level on downhill runs. The GRCs would drive me crazy while coasting downhill sections....too loud! Anyways, great value wheel that is just as good as the other set I have that cost considerably more and they weigh about the same. 30mm Contis spec'd at 30.5mm once installed. Get'em and rip!

2 out of 5 stars

July 17, 2021

At least they say Zipp....

I've put it through the wringer
5' 10"

Wanted to love them but they are: pretty flexy when standing, heavier than expected and have a 3-pawl free hub that seems like it's made of cheese -- so soft the cassette cuts into it and can't be remove without he whole hub body pulling off every time, spilling the stupid palls out on the bench. Cheap for Zipp, but still not worth the price I'm afraid.

Steven B